Role of Ni concentration on structural and magnetic properties of inverse spinel Ferrite

Journal Article · Thu Nov 15 00:00:00 EST 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.06.032· OSTI ID:22805269

Adeela, N. ^[1]; Naz, S. ^[2]; Khan, K.; Sagar, R. U.R.; Aslam, S.

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1. Polymer Material Department, School of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming (China)
2. Department of Mathematics, University of Gujrat, Gujrat, 54700 (Pakistan)

Highlights: • Ni doped Co{sub 1-x}Mn{sub x}Fe{sub 2}O{sub 4} (0≤x≤0.1) nanoparticles have been synthesized with an average particle size in the range 15–20 nm. • Lattice parameter decreases with increase in Ni concentration in CoFe{sub 2}O{sub 4} nanoparticles. • XRD and FTIR analysis confirmed the formation of cubic spinel ferrite structure. • Room temperature and low temperature magnetic properties of described system have been measured. - Abstract: In present work, Nickel (Ni) substituted Mn-Co ferrite nanoparticles, with doping content varying from 0 to 0.1, have been synthesized. The inverse spinel structure of doped cobalt ferrite has been claimed by X-ray diffractometer with average particle size of 20 nm. The decrease in lattice parameter and increase in X-ray density has been found with increase in Ni concentration in ferrite structure. Fourier transform infrared spectroscopy analysis showed two vibrational frequency bands (υ{sub 1} and υ{sub 2}) for octahedral and tetrahedral sites depicting the formation of spinel ferrite. In addition, Transmission electron microscopy analyses were carried out to investigate particle size, which indicates that TEM and XRD analyses are in agreement. Magnetic analyses depict that coercivity value increases from 635 Oe to 841 Oe in Ni doped Mn-Co ferrite. Exchange interactions between Ni and Mn{sub 0.2}Co{sub 0.8-x}Fe{sub 2}O{sub 4} result for enlargement in coercivity and shift in hysteresis loop towards positive direction along the field axis. The increment in magnetic coercive field and exchange bias has been observed as temperature decreases. Enhanced magnetic properties at low temperature are attributed to magneto-crystalline anisotropy and surface effects.

• OSTI ID: 22805269
• Journal Information: Materials Research Bulletin, Vol. 107; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
COBALT COMPOUNDS
COERCIVE FORCE
CONCENTRATION RATIO
DOPED MATERIALS
EXCHANGE INTERACTIONS
FERRITES
FOURIER TRANSFORM SPECTROMETERS
HYSTERESIS
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MANGANESE COMPOUNDS
NANOPARTICLES
NICKEL
PARTICLE SIZE
SPINELS
TEMPERATURE RANGE 0065-0273 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION